Existence and Continuance. At the date of adoption of this chapter, any lot, building or structure which has been and is still being used for a purpose which does not conform to the requirements of the particular zone where the lot, building or structure is situated and which use is lawful and properly licensed, if required, and is not prohibited by any other existing ordinance of the Borough or any statute of the State of New Jersey or the United States of America, the use may be continued, subject to other provisions contained in this section and any change of title or possession shall not affect the continuance of such existing use. The existing use may be continued as aforesaid, provided further however, that:
1. No nonconforming lot shall be further reduced in size.
2. No nonconforming building shall be enlarged, extended or increased, unless such enlargement would tend to reduce the degree of non-conformance.
3. No nonconforming use may be expanded.
4. No structural alterations or changes shall be made to any building, accessory building, garage or structure containing a nonconforming use.
5. No structural alterations shall be made in any building or structure containing a nonconforming use, to change such a building or structure to another or an additional nonconforming use.
6. No building shall be constructed upon a conforming lot which lot contains a nonconforming building or use.